(Note:For buyers in Australia country, due to the laws and regulations of your country, button batteries cannot enter your country, We don't put batteries in the hearing aid package) This is 2 pins cable Features: 1.Medium power suitable for moderate to severe hearing weak people. 2.Stable quality,simple operation,easy to use 3.Low distortion,low noise 4.take phone file function, telephone pickup Technical Parameters: Max Out: 130dB 4dB Max Gain:56dB 5dB Harmonic Distortion:10% Frequency Range:300Hz~4000Hz Equvi Input Noise:32dB Stanard battery:AA batteries,No 5 Voltage:D.C. 1.5V Current:6.5mA Specification: H--High sound clear T--Answer the phone N--normal frequency 0-9: Small-Lound ON-turn on OFF-turn off Product Weight:28g Product Size:6.5*4.3*1.8cm Package:Paper+Plastic Box Package Size:12*8.6*3.2cm Instructions: 1.The wire plug connected to the headset.Then earplug connector (hard) to the headset, earbuds (silica gel) to connect to the headphone connector pedestal 2.The battery installation: Gently open the battery compartment cover, put a battery into the battery compartment in the right direction, then close the battery compartment . 3.Before you use this item ,you have to turn the ON-OFF switch to Off,and turn the sound volume to minimum 4.Then put this item on you ear, keep it tightly 5.Next, turn this item ON, adjust the volume until you hear clear sound Note: - Adjust volume to the minimum before wearing. - Choose an earplug of slightly bigger size to avoid whistler. - Increase volume gradually to avoid sudden increase in sound. -If you hear a howling,check the ear (silica gel) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage. - Please regularly clean the ear plugs or ear molds in order to ensure the normal use of hearing aids. - Use for long periods of time, please remove the batteries to prevent battery rot erosion hearing aid components. Package Content: 1 x Hearing Aid 1 x Cleaning Brush 3x Earplug(Different Size) 1 x Instruction manual (English) Item your receive will not come with battery,as AA battery can not ship by air.